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The Blue Book of Grammar and Punctuation

English Rules

Each language has its structure for arranging and conveying information and thought. Here you will find a broad study of the governing rules behind writing in American English. Choose from our topics below for a further study of our grammar, punctuation, and vocabulary for effective composition.

Many of our rules include quizzes as well. Test and strengthen your knowledge of American English!

Grammar Rules

Punctuation Rules

Other Rules

English Grammar Rules

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Note: Some English usage rules vary among authorities. For example, the Associated Press (AP) Stylebook is a guide specific for news media and journalists while The Chicago Manual of Style (CMS) is used by many book publishers and writers. The Blue Book of Grammar and Punctuation leans towards usage rules in CMS along with other authoritative texts and does not attempt to conform to the AP Stylebook, which differs significantly in some aspects.